20
from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
25
26
from bzrlib.lazy_import import lazy_import
26
27
lazy_import(globals(), """
27
29
from datetime import datetime
29
31
from ntpath import (abspath as _nt_abspath,
89
85
# be opened in binary mode, rather than text mode.
90
86
# On other platforms, O_BINARY doesn't exist, because
91
87
# they always open in binary mode, so it is okay to
92
# OR with 0 on those platforms.
93
# O_NOINHERIT and O_TEXT exists only on win32 too.
88
# OR with 0 on those platforms
94
89
O_BINARY = getattr(os, 'O_BINARY', 0)
95
O_TEXT = getattr(os, 'O_TEXT', 0)
96
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
99
92
def get_unicode_argv():
214
205
:param unlink_func: A way to delete the target file if the full rename
208
new = safe_unicode(new)
217
209
# sftp rename doesn't allow overwriting, so play tricks:
218
210
base = os.path.basename(new)
219
211
dirname = os.path.dirname(new)
220
# callers use different encodings for the paths so the following MUST
221
# respect that. We rely on python upcasting to unicode if new is unicode
222
# and keeping a str if not.
223
tmp_name = 'tmp.%s.%.9f.%d.%s' % (base, time.time(),
224
os.getpid(), rand_chars(10))
212
tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(),
213
os.getpid(), rand_chars(10))
225
214
tmp_name = pathjoin(dirname, tmp_name)
227
216
# Rename the file out of the way, but keep track if it didn't exist
360
349
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
363
def _add_rename_error_details(e, old, new):
364
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
365
% (old, new, e.strerror))
367
new_e.to_filename = new
371
352
def _win32_rename(old, new):
372
353
"""We expect to be able to atomically replace 'new' with old.
1374
1342
normalized_filename = _inaccessible_normalized_filename
1377
def set_signal_handler(signum, handler, restart_syscall=True):
1378
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1379
on platforms that support that.
1381
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1382
automatically restart (by calling `signal.siginterrupt(signum,
1383
False)`). May be ignored if the feature is not available on this
1384
platform or Python version.
1388
siginterrupt = signal.siginterrupt
1390
# This python implementation doesn't provide signal support, hence no
1393
except AttributeError:
1394
# siginterrupt doesn't exist on this platform, or for this version
1396
siginterrupt = lambda signum, flag: None
1398
def sig_handler(*args):
1399
# Python resets the siginterrupt flag when a signal is
1400
# received. <http://bugs.python.org/issue8354>
1401
# As a workaround for some cases, set it back the way we want it.
1402
siginterrupt(signum, False)
1403
# Now run the handler function passed to set_signal_handler.
1406
sig_handler = handler
1407
old_handler = signal.signal(signum, sig_handler)
1409
siginterrupt(signum, False)
1413
1345
default_terminal_width = 80
1414
1346
"""The default terminal width for ttys.
1504
1436
if width is not None:
1505
1437
os.environ['COLUMNS'] = str(width)
1508
_registered_sigwinch = False
1509
def watch_sigwinch():
1510
"""Register for SIGWINCH, once and only once.
1512
Do nothing if the signal module is not available.
1514
global _registered_sigwinch
1515
if not _registered_sigwinch:
1518
if getattr(signal, "SIGWINCH", None) is not None:
1519
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1521
# python doesn't provide signal support, nothing we can do about it
1523
_registered_sigwinch = True
1439
if sys.platform == 'win32':
1440
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from ReadConsoleInput but
1441
# I've no idea how to plug that in the current design -- vila 20091216
1444
signal.signal(signal.SIGWINCH, _terminal_size_changed)
1526
1447
def supports_executable():
1846
1767
real_handlers[kind](abspath, relpath)
1849
def copy_ownership_from_path(dst, src=None):
1850
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1852
If src is None, the containing directory is used as source. If chown
1853
fails, the error is ignored and a warning is printed.
1855
chown = getattr(os, 'chown', None)
1860
src = os.path.dirname(dst)
1866
chown(dst, s.st_uid, s.st_gid)
1868
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1871
1770
def path_prefix_key(path):
1872
1771
"""Generate a prefix-order path key for path.
1973
1872
return socket.gethostname().decode(get_user_encoding())
1976
# We must not read/write any more than 64k at a time from/to a socket so we
1977
# don't risk "no buffer space available" errors on some platforms. Windows in
1978
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1980
MAX_SOCKET_CHUNK = 64 * 1024
1982
def read_bytes_from_socket(sock, report_activity=None,
1983
max_read_size=MAX_SOCKET_CHUNK):
1984
"""Read up to max_read_size of bytes from sock and notify of progress.
1986
Translates "Connection reset by peer" into file-like EOF (return an
1987
empty string rather than raise an error), and repeats the recv if
1988
interrupted by a signal.
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1996
# The connection was closed by the other side. Callers expect
1997
# an empty string to signal end-of-stream.
1999
elif eno == errno.EINTR:
2000
# Retry the interrupted recv.
2004
if report_activity is not None:
2005
report_activity(len(bytes), 'read')
2009
def recv_all(socket, count):
1875
def recv_all(socket, bytes):
2010
1876
"""Receive an exact number of bytes.
2012
1878
Regular Socket.recv() may return less than the requested number of bytes,
2013
depending on what's in the OS buffer. MSG_WAITALL is not available
1879
dependning on what's in the OS buffer. MSG_WAITALL is not available
2014
1880
on all platforms, but this should work everywhere. This will return
2015
1881
less than the requested amount if the remote end closes.
2017
1883
This isn't optimized and is intended mostly for use in testing.
2020
while len(b) < count:
2021
new = read_bytes_from_socket(socket, None, count - len(b))
1886
while len(b) < bytes:
1887
new = until_no_eintr(socket.recv, bytes - len(b))
2028
def send_all(sock, bytes, report_activity=None):
1894
def send_all(socket, bytes, report_activity=None):
2029
1895
"""Send all bytes on a socket.
2031
Breaks large blocks in smaller chunks to avoid buffering limitations on
2032
some platforms, and catches EINTR which may be thrown if the send is
2033
interrupted by a signal.
2035
This is preferred to socket.sendall(), because it avoids portability bugs
2036
and provides activity reporting.
1897
Regular socket.sendall() can give socket error 10053 on Windows. This
1898
implementation sends no more than 64k at a time, which avoids this problem.
2038
1900
:param report_activity: Call this as bytes are read, see
2039
1901
Transport._report_activity
2042
byte_count = len(bytes)
2043
while sent_total < byte_count:
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2047
if e.args[0] != errno.EINTR:
2051
report_activity(sent, 'write')
1904
for pos in xrange(0, len(bytes), chunk_size):
1905
block = bytes[pos:pos+chunk_size]
1906
if report_activity is not None:
1907
report_activity(len(block), 'write')
1908
until_no_eintr(socket.sendall, block)
2054
1911
def dereference_path(path):
2127
1984
def until_no_eintr(f, *a, **kw):
2128
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
if EINTR does occur. This is typically only true for low-level operations
2132
like os.read. If in any doubt, don't use this.
2134
Keep in mind that this is not a complete solution to EINTR. There is
2135
probably code in the Python standard library and other dependencies that
2136
may encounter EINTR if a signal arrives (and there is signal handler for
2137
that signal). So this function can reduce the impact for IO that bzrlib
2138
directly controls, but it is not a complete solution.
1985
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2140
1986
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2260
2105
data, _ = self.encode(object, self.errors)
2261
2106
self.stream.write(data)
2263
if sys.platform == 'win32':
2264
def open_file(filename, mode='r', bufsize=-1):
2265
"""This function is used to override the ``open`` builtin.
2267
But it uses O_NOINHERIT flag so the file handle is not inherited by
2268
child processes. Deleting or renaming a closed file opened with this
2269
function is not blocking child processes.
2271
writing = 'w' in mode
2272
appending = 'a' in mode
2273
updating = '+' in mode
2274
binary = 'b' in mode
2277
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2278
# for flags for each modes.
2288
flags |= os.O_WRONLY
2289
flags |= os.O_CREAT | os.O_TRUNC
2294
flags |= os.O_WRONLY
2295
flags |= os.O_CREAT | os.O_APPEND
2300
flags |= os.O_RDONLY
2302
return os.fdopen(os.open(filename, flags), mode, bufsize)
added
removed
bzrlib/osutils.py
